Twentieth century hand-book for steam engineers and electricians, with questions and answers .. (1905)
Swingle, C. F. [from old catalog], Horstmann, Henry Charles, 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] · Chicago, F. J. Drake & co. · leaf 598
FIGURE 100. due to the blackening of the glower caused by decom-position of the platinum contacts with which they areconnected. These lamps are made in sizes of from 1to 30 glowers, and they consume about 88 watts perglower. The light resembles very closely the lightfrom a Welsbach gas burner,…
